Rename a Volume Group in Red
Hat Enterprise Linux (RHEL 5.6)
Note: This exercise is performed on
a test VM built under VMWare workstation in Lab environment. It is therefore, advised
that perform these steps on a test environment before moving to production.
Here is current name of
volume group hosting root file system….
[root@linux1
~]# vgs
VG
#PV #LV #SN Attr VSize VFree
VolGroup00
1 2 0 wz--n- 19.88G 0
[root@linux1
~]#
Make backup copies of these
two files
# cp
/etc/fstab /etc/fstab.orig
# cp
/boot/grub/grub.conf /boot/grub/grub.conf.orig
After update, /etc/fstab will
look like ….
[root@linux1 etc]# cat fstab |grep
rootvg
/dev/rootvg/LogVol00 / ext3 defaults 1 1
/dev/rootvg/LogVol01 swap swap defaults 0 0
[root@linux1 etc]#
After update,
/boot/grub/grub.conf will look like …
[root@linux1 ~]# cat
/boot/grub/grub.conf |grep rootvg
# kernel /vmlinuz-version ro root=/dev/rootvg/LogVol00
kernel /vmlinuz-2.6.18-238.el5 ro root=/dev/rootvg/LogVol00 rhgb quiet
crashkernel=128M@16M
[root@linux1 ~]#
Rename your volume group (vg)
[root@linux1
~]# vgrename /dev/VolGroup00 /dev/rootvg
Volume group "VolGroup00"
successfully renamed to "rootvg"
[root@linux1
~]#
Check the Kernel Level
[root@linux1
~]# uname -r
2.6.18-238.el5
[root@linux1
~]#
Backup and create Kernel Image
[root@linux1
~]# cd /boot
[root@linux1
boot]# mv initrd-2.6.18-238.el5.img initrd-2.6.18-238.el5.img.backup
[root@linux1
boot]# mkinitrd -v initrd-2.6.18-238.el5.img 2.6.18-238.el5
Reboot the VM
[root@linux1
boot]# reboot
Verification after reboot
[root@linux1
~]# vgs
VG
#PV #LV #SN Attr VSize VFree
rootvg
1 2 0 wz--n- 19.88G 0
[root@linux1 ~]#
[root@linux1 ~]#